We present a measurement of the muon charge asymmetry from W boson decays using 0.3 fb(−1) of data collected at s√=1.96 GeV between 2002 and 2004 with the D0 detector at the Fermilab Tevatron pp-bar Collider. We compare our findings with expectations from next-to-leading-order calculations performed using the CTEQ6.1M and MRST04 NLO parton distribution functions. Our findings can be used to constrain future parton distribution function fits.
This is the publisher's version, also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.77.011106.
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